JVC KD-ADV7490 Manuel D'instructions page 41

Connecting an external component to the AV-IN input jack
* Portable Video/Audio player of this pin-allocation can be connected:
AV mini plug cable (supplied)
1 2
Audio (R) GND
Video GND
GND
Portable Video/Audio
player *
3 4
Video Audio (L)
Audio (R) Audio (L)
Audio (R) Audio (L)
EXTERNAL DEVICES
Camcorder
iPod, etc.
AUX
41